For over 25 years, the Original McKenzie Lumbar Roll supports have helped hundreds of thousands achieve freedom from common low back pain. These lumbar rolls are the top-selling lumbar cushions, and the recommended choice of physical therapists, chiropractors, and back pain professionals around the world. Their durable, high-quality construction is unparalleled; they feature a non-wrinkle, moisture-wicking, 100% polyester removable cover. Despite many imitators on the market, the Original McKenzie Lumbar Roll remains the only lumbar support approved for use with the McKenzie Method and the "Treat Your Own" series of self-help exercise books written by the late Robin McKenzie, perhaps the single most influential person in orthopedic physical therapy. These back supports are ideal in the car, at the office, or for use with any seat that does not provide adequate lumbar support. They help ensure proper spine alignment and posture while sitting, providing comfortable back pain relief for the lumbar (low back) region. The built-in strap secures the lumbar roll to most chair backs and can even be used around the waist. Choose from standard density or firm density for added support. Rolls measure approximately 11" L x 4.75" diameter. Strap contains latex. Made in the USA.